Dynamo-electric machine



R. B. WILLIAMSON.

DYNAMO-ELECTRIC MACHINE.

APPLlcmoN Humy APRJ. |920.

T 0 all whom t may @micro UNITED STATES PATENT OFFICE..

ROBERT B. WILLIAMSON, OF` MILWAUKEE, WISCONSIN, ASSIGNORITO .ALLIS(.'IHLIMERSk MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A

. conPoRA'rroN or DELAWARE.

1 DYNAMO-ELECTRIC MACHINE Beit known that ROBERT a citizen of the UnitedStates of America, residing` atMilwaukee, in the county of waukee andState of Wisconsin, 'has-invented a certain new` and vuseful Improvementin Dynamo-Electric Machines, of whichv the following is a specification.

This invention relatesto dynamo electric machinesv and particularly thatportion of such machines commonly known as` the re-` volving eld.Moreparticula'rly the invention relates tora method and constructionwhereby .the electrical connections to the field windings vare brought-`downto slip rings or other means ofconnection.'

i One oftheobjects of theinvention isi-the provisiony of a simple andefficient mode of'4 bringing down such feldfconnections.l ,Anotherob]ect is .the provision of a yconstrucktion'whereby.. either theconnections or ,the f pole pieces or both' may be readily removed `anddisassembled... Still another object., is Ythe provision of aconstruction whereby the4 connections arel so located andfconstructedthat 'the centrifugal strains thereon will be reduced to a minimum andthose" Slight strains.. which.,remain are adequately pro Yvided against.-Another object is the provision of a mode oflconstructionnof makingsuch connections which will be very lcoinf pact. Other objects willappear hereinafter as the description of the invention'` proceeds.

'VN .The novelfeatures of theV invention will appear from thisyspecification and the accompanynignrawings constituting ag part thereofand ,embodyingfone form ofthe invention and all ,thesev` novelfcatures-'areintended `to .be pointedout inthe claims., l y

Y revolving fieldy member in side elevation, a portion thereof being invsection.

The revolving field member 1, wliichrmay' be yof annular form,isprovided witlisany desired number or'` pole pieces. Two fofthe pole.'pieces 2, f3. are shown in the drawing.'

and` areA providedfwith'; field windings 4, 5

"respectively, vIn large machines ksuch field windings-lare usuallyAwound of ribbon-like these ribbon conductors ofthe field windf ings 4,5r is shown in the draw-ings,V These Vany other purpose. y u s i ylargecentrifugal strains involved inlthe use f 4In the c lrawing, vFig. 1 isa fragmentwoi:

Specification of Iietters Patent. Patented June 6,1922;

Application iieiiaprii 5, 192ml serial No. 372,092.

terminals mayas is clearly sliownin 2, be disposed opposite to eachother. In

order to bring the electricalconnections to the fieldwindings downto theusual slip.

rings (not` shown) or otherA connecting means, in accordancewith thepresent invention, the core 1V is provided with a desired number ofholes 17 through which conducting. rods ork bolts 7, 8 may bepassed.

These rods are provided with heads 9, y10,`

here shown having fiat connecting surfaces 11, 12 respectively.' Therods 9, 10 are here shown las electrically connected 4with the fieldwinding terminals 6, 24 respectively by means of conducting connectors13, 14 which may, if desired, be riveted to the rod-heads by rivets 15vand bolted to thefield winding terminals -by bolts 16. In certaininstances the terminals 6 24 might, be connected `di-` rectlyto therodlieads. n

l The rods 9and 10 aresuitable insulated from the core 1 asby an`insulatingbushing 18 and insulating washers 19, 20. The rods usedtotightly fasten the rod tothe core.

l It will' be noted thatby reason of the present construction, asdistinguished from 9, 10. have "threaded ends "21,' one of which `isvisible in Fig. 1 and a .nut 22 maybe prior constructions involving' theuse of 7' strap conductors passing around the edge of and the sideot thecore,the. parts may be i readily and quickly.disassembled"in case it isdesired `to repair the pole pieces, or` for Atthe same time, ythev ofstrap conductors passingk over the side Hoi" the core and the attendantstrains on the winding terminalsl are avoided. It; .will

also benoted thatby reason of the relative location of the4 fieldwinding terminals and v compact" con# i 10o exactv details of'construction herein shown and described, f for obvious` .modifications`s may occur to persons skilled in thef'art. f `conductors and'oneterminaleach, 24C', 6, of

It is claimed and Letters Patent:

desiredy to secure, by

los I CIK vpair of pole pieces spaced apart, field wind.- `ings on saidpole pieces comprising ribbon ing iield member of the type having aplurality of pole pieces mounted on a core and conducting leads for thefield windings passing radially through said core and fastened thereto.

2. ln a dynamo electric machine, a revolving field member having a coreand a pair of pole pieces spaced apart, field windings on said polepieces, a conducting lead passing;- radially through said core andfastened thereto and having means connectible to one ofsaid windingsdisposed. between said pole'pieces. Y

3. In a dynamo electric machine, a revolving held member having a lcoreand a i u Y n conductors, a conducting rod p assing through on said polepieces comprising ribbon condiietoi's, said conductor terminals emergingl from said windings at vsubstantially opposite points, two conductingrods ypassing through said core cach rod being provided with a head,conducting means for connecting the heads to the respective field.winding terminals and means for fastening said rods tc said core.y v

5. In a dynamo electric machine, a revolving field member having a coreand a pair of pole pieces spaced apart, field windings on said polescomprising ribbon conductors` i the terminals 4ol: said conductorsemerging` from said windings at substantially opposite points, twoconducting rodselectrically conf nected to said conductor terminalspassing through said core, and means for fastening said rods to saidcore.

6. Ina dynamo .electric machine, a revolving field member of the typehaving a plurality of polepieces mounted on core,

ymeans for making electrical connection to a field winding comprising aconducting rod-passing through said core and fastened .thereto said rodhaving a head having a iiat connectingsurface in a plane substantiallyparallel-to the axis of the rod.

7. In a dynamo electric machine, a re-` volving field member having acore and a pairof pole pieces spaced apart, field windings yon said polepieces, a conducting rod passing through said core between said polepieces, means for fastening said rod to said core, and means forelectrically connecting said rod to a terminal of said field winding.

8. In a dynamo electric machine, a revolving field member having a coreand a pair of pole pieces spaced apart, field windings on said polepieces, a conducting rod passing radially through said core between saidpole "0 pieces, means for fastening said rod` to said core, and meansfor electrically connecting said rod to a terminal of said fieldwinding.

9. In a dynamo electric machine, a revolving field meinbei' having acore and a pair of pole pieces spaced apart, field windings on said polepieces, a pair of conducting rods passing' through said core betweensaid pole pieces, means for fastening said rods to said. core, and meansfor electrically connecting Vsaid rods to respective terminals of saidfield windings.

l0. In a dynamo electrlc machine, a revolving field member having a coreand a pair oit pole pieces spaced apart, field windings on said polepieces comprising ribbon conductors, said conductor terminals emergingfrom said windings at substantially opposite points, two conducting rodspassing through said core between said pole pieces and on. oppositesides of the general radial plane of said terminals, means for fasteningsaid rods to said core, and means for electricallyy connecting said rodsto respective terminals of said field windings.

ll. In a dynamo electric machine, a revolving field member having a.core and a pair of' pole pieces spaced apart, :field windings on saidpole pieces comprising ribbon conductors,said conductor terminalsemerging from said windings at substantially opposite points, twoconducting rods passing through said core between said pole pieces andon opposite sides of the general radial plane of said terminals, saidrods each having a head having a Hat connecting surface in a planesubstantially parallel to the axis of said rods, means Jfor fasteningsaid rods to said core, and means for electrically connectin saidsurface to respective terminals of said field windings. y

12. In a dynamo electric machine, a revolving field member of the typehaving a plurality of pole pieces mounted onva core, means 'for makingelectrical connection to a 115 field winding comprising a bolt passingthrough said core, said bolt having a head having a flat connectingsurface, and a nut for said bolt for fastening the same to said core.

13. In a dynamo electric machine, a revolving field member of the typehaving a `plurality of pole pieces mounted on a core,

means for making electrical connection to a field winding comprising abolt passing through said core, said bolt having a head having a Hatconnecting surface in a plane substantially parallel to the axis of thebolt, and a nut for said bolt for fastening the same to said core.

14. In a dynamo electric machine, a revolving ield member of the typehaving a plurality of pole pieces mounted on a core, and field windingscomprising ribbon conductors, means for making electrical connection toa Held winding comprising a bolt passing through said core, said bolthaving a head having a flat connecting surface, and a nut for said boltfor fastening the same to said core.

15. In a dynamo electric machine, a revolvingjfield member of lthe typehaving a plurality of pole pieces mounted on a core and field windingscomprising ribbon conductors, means for making electrical connection toa field Winding comprising a bolt passing through said core, said bolthaving a head having a fiat connecting surface in a plane substantiallyparallel to the axis of the bolt, and a nut for said bolt for fasteningthe same to said core.

16. In a dynamo electric machine, a revolving field member of thetypehaving a core and a pair of pole pieces spaced apart, ,field windings onsaid pole pieces comprising ribbon conductors, said conductor terminalsemerging from said windings in an axial plane, two conducting rodspassing radially through said core between said pole pieces, said rodseach having a flat connecting 'surface in an axial transverse plane, andj means for electrically connecting sald con- Y `necting surfaces torespective terminals of said field windings;

In testimony whereof, the signature of the inventor is affixed hereto.

` ROBERT B. WILLIAMSON.`

